A-PDF Scan Optimizer provides a quick way to batch optimize your scanned PDF documents. A-PDF Scan Optimizer help you to correct the skew scanned image within PDF; convert the scanned image to black/white or gray in Acrobat PDF; downsample the image in PDF and delete unused blank page in PDF directly. A-PDF Scan Optimizer opens a PDF file and automatically checks if images inside are skewed, then corrects the skewed images using a special algorithm.